writebdf.c File Reference

#include <assert.h>
#include <openedf.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>
#include <pctimer.h>
#include <ctype.h>
#include <nsutil.h>
#include <nsnet.h>

Go to the source code of this file.

Data Structures
struct	Options
	Command line options will be decoded into this structure. More...
Defines
#define	MINLINELENGTH   4
#define	DELIMS   " \r\n"
Functions
void	resetSampleBuffer ()
	reset frame counter
void	writeSampleBuffer (unsigned int Channel, unsigned int SampleNr, char Byte0, char Byte1, char Byte2)
	writes sample data into data buffer in the right order
void	initSampleBuffer ()
	allocates memory for data buffer
void	writeBufferToFile ()
	writes data chunk to file
void	handleSamples (int packetCounter, int channels)
	copy data to sample buffer, write buffer to file if it is full
int	isANumber (const char *str)
	check, if data is a number
void	serverDied (void)
	action to take if server died
int	main (int argc, char **argv)
Variables
const char *	helpText
	Program to save data from the neuroserver in a file.
EDFDecodedConfig	cfg
	EDF header information block.
InputBuffer	ib
	network input buffer
char	lineBuf [MAXLEN]
	buffer for ASCII data frames
int	blockCounter = 0
	number of data blocks written
char *	dataarray
	pointer for data block
long	samples [MAXCHANNELS]
	channel sample data
size_t	sampleSize
	amount of memory for one sample (16 or 24 bits)
unsigned int	frameCount
	counter for received data frames
Options	opts
	place to store command line options

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Define Documentation

#define DELIMS   " \r\n"

Definition at line 71 of file writebdf.c.

#define MINLINELENGTH   4

Definition at line 70 of file writebdf.c.

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Function Documentation

void handleSamples (  int  packetCounter, int  channels )

copy data to sample buffer, write buffer to file if it is full Definition at line 158 of file writebdf.c. References cfg, EDFDecodedConfig::chan, frameCount, Options::isBdf, opts, rprintf(), EDFDecodedChannelHeader::sampleCount, samples, writeBufferToFile(), and writeSampleBuffer().

void initSampleBuffer (   )

allocates memory for data buffer < get 3 bytes/sample (BDF Standard) < get 2 bytes/sample (EDF Standard) < allocate one big array of bytes Definition at line 124 of file writebdf.c. References cfg, EDFDecodedConfig::chan, dataarray, EDFDecodedHeader::dataRecordChannels, EDFDecodedConfig::hdr, Options::isBdf, opts, resetSampleBuffer(), EDFDecodedChannelHeader::sampleCount, and sampleSize. Referenced by main().

int isANumber (  const char *  str  )

check, if data is a number Definition at line 200 of file writebdf.c.

int main (  int  argc, char **  argv )

check filename open file start networking configure neuroserver connection now decode EDF header check for 24bit BDF data format write header to data file (if not in CSV mode) data0 data1 data2 ... Definition at line 218 of file writebdf.c. References cfg, cur, EDFDecodedHeader::dataFormat, DEFAULTHOST, DEFAULTPORT, DELIMS, EDFPacket, Options::eegNum, Options::filename, getOK(), handleSamples(), EDFDecodedConfig::hdr, EDFDecodedHeader::headerRecordBytes, helpText, Options::hostname, ib, initSampleBuffer(), isANumber(), Options::isArray, Options::isBdf, isEOF(), Options::isFilenameSet, Options::isLimittedTime, lineBuf, linePos, MAXHEADERLEN, MINLINELENGTH, ob, opts, pctimer(), Options::port, rconnectName(), readEDFString(), readline(), rexit(), rinitNetworking(), rprintf(), rselect(), rsocket(), samples, Options::seconds, serverDied(), sock_fd, sock_t, and writeString().

void resetSampleBuffer (   )

reset frame counter Definition at line 103 of file writebdf.c. References frameCount. Referenced by initSampleBuffer(), and writeBufferToFile().

void serverDied (  void   )

action to take if server died Definition at line 210 of file writebdf.c. References rprintf().

void writeBufferToFile (   )

writes data chunk to file goto end of file block write sample data Definition at line 139 of file writebdf.c. References blockCounter, cfg, dataarray, EDFDecodedHeader::dataRecordChannels, Options::filename, frameCount, EDFDecodedConfig::hdr, opts, resetSampleBuffer(), rprintf(), and sampleSize. Referenced by handleSamples().

void writeSampleBuffer (  unsigned int  Channel, unsigned int  SampleNr, char  Byte0, char  Byte1, char  Byte2 )

writes sample data into data buffer in the right order Definition at line 110 of file writebdf.c. References cfg, EDFDecodedConfig::chan, dataarray, Options::isBdf, opts, EDFDecodedChannelHeader::sampleCount, and sampleSize. Referenced by handleSamples().

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Variable Documentation

int blockCounter = 0

number of data blocks written Definition at line 92 of file writebdf.c. Referenced by writeBuffers(), and writeBufferToFile().

struct EDFDecodedConfig cfg

EDF header information block. Definition at line 88 of file writebdf.c. Referenced by EDFEncodePacket(), getDataRecordChunkSize(), getSamplesPerSecond(), getSecondsPerSample(), handleSamples(), initSampleBuffer(), initSampleBuffers(), isValidREDF(), main(), newEDFInputIterator(), readEDF(), readEDFString(), setEDFHeaderBytes(), writeBuffers(), writeBufferToFile(), writeEDF(), writeEDFString(), and writeSampleBuffer().

char* dataarray

pointer for data block Definition at line 94 of file writebdf.c. Referenced by initSampleBuffer(), writeBufferToFile(), and writeSampleBuffer().

unsigned int frameCount

counter for received data frames Definition at line 98 of file writebdf.c. Referenced by handleSamples(), resetSampleBuffer(), and writeBufferToFile().

const char* helpText

Initial value: "writeedf v 0.35 by Rudi Cilibrasi, Moritz von Buttlar\n" "\n" "Usage: writeedf [options] <filename>\n" "\n" " -p port Port number to use (default 8336)\n" " -n hostname Host name of the NeuroCaster server to connect to\n" " (this defaults to 'localhost')\n" " -s <num> Only record this many seconds.\n" " (default is to record until interrupted)\n" " -e <intnum> Integer ID specifying which EEG to log (default: 0)\n" " -b use bdf format (same as edf, only 24 bits/sample) \n" " -c write as CSV array (can be imported to Excel, Scilab,etc.)" "The filename specifies the new EDF file to create.\n" Program to save data from the neuroserver in a file. Author: Rudi Cilibrasi, Moritz von Buttlar Todo: add CSV output (excel, Scilab, gnuplot etc. direct import) This program is used to connect to the neuroserver and receive an eeg data stream. It saves this data in a file using the European Data Format (EDF). There's also an option to use the 24bit extended format like it is specified and used by BioSemi (also called BDF). This is useful for e.g. 24bit DC coupled eeg devices. The 24bit mode is also auto-detected if the data format field starts with "24". For the file data binary numbers are used. The program writes data blockwise: it opens the file, writes one data record, then closes the file (in the write_buffers function) Definition at line 54 of file writebdf.c.

struct InputBuffer ib

network input buffer Definition at line 90 of file writebdf.c.

char lineBuf[MAXLEN]

buffer for ASCII data frames Definition at line 91 of file writebdf.c.

struct Options opts

place to store command line options Definition at line 99 of file writebdf.c.

long samples[MAXCHANNELS]

channel sample data Definition at line 95 of file writebdf.c. Referenced by cmdDataFrame(), doesMatchP3(), fetchSamples(), handleSamples(), idleHandler(), isValidPacket(), and main().

size_t sampleSize

amount of memory for one sample (16 or 24 bits) Definition at line 97 of file writebdf.c. Referenced by initSampleBuffer(), writeBufferToFile(), and writeSampleBuffer().

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